Add 81/15 and 1/40
1st number: 5 6/15, 2nd number: 1/40
81/15 + 1/40 is 217/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
81/15 = 81 × 8/15 × 8 = 648/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
1/40 = 1 × 3/40 × 3 = 3/120 - Add the two like fractions:
648/120 + 3/120 = 648 + 3/120 = 651/120 - 651/120 simplified gives 217/40
- So, 81/15 + 1/40 = 217/40
In mixed form: 517/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/15+2/40 81/30+1/40 81/15+1/80 81/15+3/40 81/45+1/40 81/15+5/40 81/75+1/40 81/15+7/40